Improvement in valves foe steam engines



@uiten tatr getest @Hite RICHARD C. M. LOVELL, OF COVINGTON, KENTUCKY.

Letters Patent No. 67,324, dated July 30, 1867.

IMPROVEMENT IN VALVES FOB. STEAM ENGINES.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, RICHARD C. M LOVELL, of Covington, Kenton county,State of Kentucky, have invented new and useful improvements inValve-Motion; and I do hereby declare the following to be a full, clear,and exact description of the same, sutlcient to enable one skilled inthe art to which it appertains to construct and use the same, referencebeing had to the accompanying drawings, which are made part of thisspecification, and in which the same letters indicate similar parts.

Figure 1A is a vertical section transversely to the cylinders andlongitudinally of the valve-chamber and valve operation piston-chamberon-the line w w, tig. 2.

Figure 2 is a vertical section on the line z x, iig. 1.

Figure 3 is a horizontal section on the line y y, fig. 1.

Figure 4 is a horizontal section on the line z z, fig. 1.

The valve arrangement is adapted to the use of two single-actingengines. It consists of a balanced valve operated by a double-actingpiston in a cylinder, to which steam is admitted from the single-actingengine cylinders alternately.

In the drawings H H are two cylinders, in each of which reciprocates o.piston, z'. In the form represented the engine is intended for working apair of chisels for mining coal, quarrying, or tunnelling. Thepiston-rod] in this case passes through both cylinders. Heads andstuing-boxes are provided with packing at these points. One end of eachpiston-rod is supposed in the present case to be furnished with n.chisel, the other end being connected by cross-heads and pitmen to aworking-beam, which secures this coincidence of motion. Each piston issingle-acting, steam'being admitted and exhausted through the passage R,which connects that end of the cylinder with the vulvechamb`er K, theconnection of the cylinders H H being made with chamber K at pprespectively. Live steam from the boilers is admitted to each end of thebalance-valve S, while the space included between the valve-heads isoccupied by exhaust steam, which finds its exit at the pipe W. Steam issupplied to the valve-chamber by pipe X, and the inductionvopening iscontrolled by a rod to the valve S. The piston z' has a. packing-ring',k.- and the upper edge has a groove, as seen in figs. 1 and 2. i

As soon as the packing-ring k has passed the port m the live steambehind the piston passes-along the groove and through the port m to theend of the chamber L, acting upon the piston T to move the valve S. Theother side of the piston T is only exposed to the pressure of exhauststeam, which yields and escapes through pol-tm to the other cylinderwhich is in communication with the exit pipe. The air enters anddischarges to and from the front end of each cylinder by ports n.

Having described my invention, what I claim therein as new, and desireto secure by Letters Patent, is-

The arrangement of the pistons iz', ports -m m, and double-actingvalve-moving piston T, substantially as described.

To the above specification of my improved valve-motion I have signed myhand this 7th day of February, 1867.

R. C. M. LOVELL.

Witnesses:

S. C. KEMON, EDWARD H. KNIGHT.

